Monday

February 20, 2017
Number of results: 49,531

**trig**

ferris wheel one has a 40ft diameter, revolves once every 30 seconds and is 5ft above ground. Ferris wheel two has a diameter of 20feet, revolves once every 15seconds and is 2 feet above the ground. each angular velocity?? each linear velocity??

*June 11, 2013 by ozzy*

**Physics**

A circular saw blade rotating at 3600 rpm is braked to a stop in 6 seconds. What is the angular acceleration? How many revolutions did the blade make before coming to a stop?

*December 2, 2010 by Anthony*

**Math**

A pair of belted pulleys have diameters of 20 inch and 16 inch respectively.If the larger pulley turns at 2000 rpm, how fast will the smaller pulley turn.

*February 3, 2014 by Chelsey*

**Math**

Here is the question : A Ferris wheel is 40 meters in diameter and boarded from a platform that is 5 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 4 minutes. How many minutes ...

*September 2, 2014 by Lili*

**Math**

I don't know how to solve this math problem? A call center is 120 yd. long and 40 yd. wide. Each employee requires 30 sq. ft. if the center needs to have 40% of open space, how many employees can be seated in the center?

*October 9, 2011 by Paula*

**Physics**

A propeller is modeled as five identical uniform rods extending radially from its axis. The length and mass of each rod are 0.721 m and 2.55 kg, respectively. When the propellor rotates at 561 rpm (revolutions per minute), what is its rotational kinetic energy?

*October 24, 2016 by Morgan*

**Trig**

Hi everyone, I have a WS due tomorrow, and would really appreciate some help. You are taking a ride on a Ferris wheel that is 100 feet in diameter and has a bottom point that is 10 feet above the ground. Suppose that the wheel rotates four times every minute and from your ...

*January 20, 2011 by Anon*

**college physics**

The blade in a food processor spins at 1700 rpm. After the machine is turned off, the blade comes to a stop in 3.7s. How many revolutions does it make during this time, assuming constant angular deceleration?

*May 14, 2010 by Adam*

**Physics**

Canadian geese move up and down on the surface of a lake. If one moves up and down 15 times a minute and you estimate the distance between the wave crests to be 1 m, determine the speed of the water F = rpm F = 15/60 F = .25 V = wavelength * Frequency v = 0.25 m/s Thank you

*July 26, 2015 by Lucina*

**physics**

7.A turntable reaches an angular speed of 33.3 rpm, in 2.1 s, starting from rest. (a) Assuming the angular acceleration is constant, what is its magnitude? b How many revolutions does the turntable make during this time interval?

*February 22, 2011 by jimmyjonas*

**Physics 1**

The hard disk in a laptop computer contains a small disk that rotates at a rate of 5000 rpm. If this disk has a radius of 2.3 cm, what is the centripetal acceleration of a point at the edge of the disk?_____m/s^2

*October 3, 2012 by John*

**Physics 1**

The hard disk in a laptop computer contains a small disk that rotates at a rate of 5000 rpm. If this disk has a radius of 2.3 cm, what is the centripetal acceleration of a point at the edge of the disk?_____m/s^2

*October 4, 2012 by John*

**Pre-Cal**

A Ferris wheel is 40 meters in diameter and boarded from a platform that is 5 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes one full revolution every 7 minutes. You make two complete revolutions on...

*February 14, 2014 by Courtney*

**Physics/Calculus**

At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The wheel has a diameter of 14.8 m, the bottom of the wheel is 1.8 m above the ground and its rim is moving at a speed of 1.0 m/s. The boys are seated in positions 45° from each other. ...

*October 14, 2010 by Donny*

**Math**

At the amusement park, you decide to ride the Ferris wheel, which has a maximum height of 100 meters and a diameter of 50 meters. It takes the wheel seven minutes to make one revolution. If you start your ride at the midline and the ferris wheel rotates counter clockwise, how ...

*May 23, 2016 by Kori*

**Physics**

A jet transport has a weight of 2.03 x 106 N and is at rest on the runway. The two rear wheels are 16.0 m behind the front wheel, and the plane's center of gravity is 12.1 m behind the front wheel. Determine the normal force exerted by the ground on (a) the front wheel and on...

*December 1, 2014 by Jenna*

**Physics**

A wheel accelerates from rest to 59 rad/s at a rate of 58 rad/s^2 What is the angular displacement of the wheel??? A) 24 rad B) 38 rad C) 30 rad

*November 18, 2016 by Katelyn*

**physic 2a**

A car accelerates uniformly from rest to a speed of 55.0 mi/h in 11.0 s.

*September 1, 2013 by Anonymous*

**physics**

A circle is cut out of a uniform piece of plywood. How does the rotational inertia measured around a point on its outer edge compare with the rotational inertia about its central axis? a. The two rotational inertias are the same. b. The rotational inertia about its edge is ...

*May 15, 2016 by ChrismB*

**Trig**

As you ride a ferris wheel, your distance from the ground varies sinusoidally with time. When the last passenger boards the ferris wheel and the ride starts moving, let your position be modeled by the diagram provided. Let t be the number of seconds that have elapsed since you...

*March 22, 2012 by TRig*

**physics**

Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. The blue car accelerates uniformly at a rate of 5.5 m/s2 for 4.9 seconds. It then continues at a constant speed for 6.7 seconds, before applying the brakes such that the car...

*January 27, 2014 by kayle*

**Math**

The first ferris wheel was built in1893 in Chicago. It's diameter was 250 feet.how many feet did the ferris wheel rotate with each complete turn?

*January 24, 2013 by Kimmmee*

**trigonometry**

A bicycle wheel has a diameter of 2 feet and turns at the rate of 70 revolutions per minute. How fast does the wheel move in feet per hour?

*January 19, 2015 by john rick baluran*

**physics**

A space station, in the form of a wheel 110 m in diameter, rotates to provide an "artificial gravity" of 3.00 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of rotation of the wheel (in revolutions per minute) that will produce this effect. ...

*July 10, 2010 by laura*

**College Physics**

A turntable reaches an angular speed of 33.3 rpm, in 2.0 s, starting from rest. (a) Assuming the angular acceleration is constant, what is its magnitude? (b) How many revolutions does the turntable make during this time interval?

*September 25, 2009 by Megan*

**Physics**

(b)A centrifuge has a maximum rotation rate of 10,000 rpm and can be stopped in 4 seconds. Assume the deceleration is uniform. The centrifuge radius is 8 cm. What is the distance that a point on the rim travels during deceleration?

*August 9, 2010 by Oisin*

**Physics**

A 700g block on a 130.0 cm long string (radius) swings in a circle on a horizontal frictionless surface. If the string will break when the tension exceeds 36.0 N, at what maximum rpm can the block rotate?

*December 11, 2011 by Anonymous*

**Trigonometry**

The diameter of the wheel is 165 feet, it rotates at 1.5 revolutions per minute, and the bottom of the wheel is 9 feet above the ground. Find an equation that gives a passenger's height above the ground at any time t during the ride. Assume the passenger starts the ride at the...

*July 18, 2013 by Anonymous*

**physics**

A Ferris wheel with radius 14.0 m is turning about a horizontal axis through its center as shown in the figure. The linear speed of a passenger on the rim is constant and equal to 7.0 m/s. What are the magnitude and direction of the passenger's acceleration as she passes ...

*November 6, 2010 by meera*

**math**

If a flywheel is 3 fee in diameter and if a belt over the wheel is traveling at the rate of 3000 feet per minute, find the number of revolutions of the wheel per minute.

*September 2, 2011 by Hazel :)*

**Math**

If a wheel has a nail stuck in the tire, the tire is 60m in diameter and the wheel drove R -234(1,0) how far did the nail travel?

*January 27, 2013 by Ronald*

**trig**

The ferris wheel in an amusement park. It has a diameter of 24m, and it takes 40s to make one complete revolution. If Peter gets on a gondola which is vertically below the centre of the ferris wheel, find his rise in the height after 5s.

*March 31, 2014 by Yuika*

**Math**

A trundle wheel can be used to measure the walking distance between two locations. a) If the diameter of a trundle wheel is 45cm, how far will a person have walked when the wheel makes one full rotation? b) If a person walks for 0.7km, how many times has the wheel rotated? We ...

*July 16, 2014 by Anonymous*

**Language Arts**

A community center has announced that it will close next month which of the following types of writing could you use most effectively to try to change the situation? A) A letter to the editor urging newspaper readers to come to a "save the center" rally••• B) A ...

*January 11, 2016 by Amanda*

**physics**

How much tangential force must be exerted to stop a rotating solid disk (radius = 1.50 feet) weighing 480 lbs in 12.0 seconds? The disk is initially rotating at 600 RPM.

*December 12, 2013 by Anonymous*

**Physics**

There are two wheels with diameter 30 inches and 20 inches. The first wheel covers a certain distance in 240 revolutions. In how many revoluions would the second wheel cover the same distance?

*September 30, 2010 by Lost In Studies*

**physics**

A Ferris wheel at an amusement park having a diameter of 14 m completes one rotation in 45 s. (a) What is the rotational speed of this Ferris wheel in revolution per minute and in degrees per second?

*March 2, 2011 by anonymous*

**Physics**

Forces F1=7.50N and F2=5.30N are applied tangentially to a wheel with radius 0.330 m. What is the net torque on the wheel due to these two forces for an axis perpendicular to the wheel and passing through its center? It depends upon whether or not the forces F1 and F2 are both...

*March 27, 2007 by Karla*

**Physics**

A mass accelerates uniformly when the resultant force acting on it is......?

*April 19, 2014 by Blessing*

**Math**

In one revolution a wheel moves forward a distance equal to its circumference. This is because the wheel Always in contact with the floor. 1)A trundle wheel clicks everytime. What is the radius of the wheel

*October 5, 2013 by Bob*

**trig**

a wheel has a diameter of 18 inches and makes one full turn in 12 seconds and picks up a piece of gym how high off the ground is that piece of gum 18 seconds after the wheel picked it up

*September 11, 2010 by suZANNE*

**mechanical science**

10. A car is moving in a straight line starts from rest, accelerates uniformly at 12 m/s2 for the first 5s, then travels at uniform speed for the next 2s and finally decelerates uniformly at 4 m/s2 for the next 5s. Draw the acceleration-time graph, velocity-time graphs and ...

*December 20, 2012 by anshuman kumar*

**MAth algebra 1**

Steve is driving to a ski resort. At first, he drove at a rate of 65 mph. Then a snow storm started and he had to slow down to 40 mph. In total. it took him 6 hours to drive 310 miles. Which system of equations represents this situation? A. 6x + y= 1 x + y= 310 B. x + y= 105 ...

*February 8, 2016 by dbzaltheway*

**physics**

A clothes dryer is spinning at 75 rpm. A student opens its door and it comes to rest after rotating through four revolutions. Assume constant deceleration. What was the magnitude of the dryer's angular deceleration?

*March 23, 2011 by HARD!!!!*

**physics**

A clothes dryer is spinning at 75 rpm. A student opens its door and it comes to rest after rotating through four revolutions. Assume constant deceleration. What was the magnitude of the dryer's angular deceleration?

*March 23, 2011 by need help as soon as possible*

**Physics (angular momentum)**

A solid disk of 5kg and radius 0.5m turns at the rate of 10rpm. You then carefully place a 2kg book at the edge of table as it spins. What is the new rotation rate of the table(in rpm)?

*July 15, 2012 by Kayla*

**Physics**

A conical pendulum is formed by attaching a 0.60kg ball to a 1.0m -long string, then allowing the mass to move in a horizontal circle of radius 30cm. 1. What is the tension in the string 2. What is the ball's angular velocity in rpm?

*March 21, 2013 by Leanna*

**Math**

If the diameter of a wheel is 10 inches. What is the circumference of the wheel in inches?

*January 27, 2017 by Jae*

**physics**

A laboratory centrifuge on earth makes n rpm (rev/min) and produces an acceleration of 7.00 g at its outer end. What is the acceleration (in g's, i.e., acceleration divided by g) at a point halfway out to the end?

*November 27, 2010 by jessica*

**physics**

A laboratory centrifuge on earth makes n rpm (rev/min) and produces an acceleration of 7.00 g at its outer end. What is the acceleration (in g's, i.e., acceleration divided by g) at a point halfway out to the end?

*November 27, 2010 by jessica*

**physics**

A thin nonconducting rod is bent to form a semi-circle of radius R. A charge Q is uniformly distributed along the upper half and a charge -Q is uniformly distributed along the lower half, as shown int he sketch at the right.find E vector at P, the center of the semi-circle. ...

*September 13, 2010 by peter*

**physics 2**

A thin nonconducting rod is bent to form a semi-circle of radius R. A charge Q is uniformly distributed along the upper half and a charge -Q is uniformly distributed along the lower half, as shown int he sketch at the right.find E vector at P, the center of the semi-circle. ...

*September 13, 2010 by peter*

**Physics**

The blades in a blender rotate at a rate of 6500 rpm. When the motor is turned off during operation, the blades slow to rest in 2.6 s. 1. What is the angular acceleration as the blades slow down?

*November 22, 2010 by Nick*

**Trig**

A Ferris wheel is 40 meters in diameter and boarded from a platform that is 4 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 2 minutes. How many minutes of the ride are spent ...

*February 13, 2013 by Christine*

**precalculus**

A Ferris wheel is 10 meters in diameter and boarded from a platform that is 3 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 4 minutes. How many minutes of the ride are spent ...

*July 9, 2014 by Anonymous*

**Physics**

The motion of a piston in an automobile engine is nearly simple harmonic. If the 1-kg piston travels back and forth over a total distance of 10.0 cm, what is its maximum speed when the engine is running at 3 000 rpm? The answer is 15.7 m/s but I don't understand how to get there.

*July 9, 2010 by Katie*

**statistics (college**

An insurance company checks police records (in a city) on 500 accidents selected at random and notes that teenagers were at the wheel in 120 of them. It is desired to test if this information indicate that more than 20% of auto accidents involve teenage drivers in the city. ...

*May 23, 2012 by Hannah*

**physics**

what is the average velocity of a vehicle that uniformly accelerates from rest to 38 fps?

*September 27, 2011 by lou*

**physics**

What is its speed after 1.87 s if it accelerates uniformly at −4.31 m/s^2? Answer in units of m/s

*September 3, 2012 by selena*

**Physics**

An automobile uniformly accelerates from rest at 15 ft/s2 for 6s. What is the fanal velocity in ft/s? v=d/t 15 *6= 90 90ft/s

*September 27, 2015 by RP*

**Physics**

The combination of an applied force produces a constant total torque of 39.6 N.m on a wheel rotating about a fixed axis. The applied force acts for 5.3 s. During this time, the angular speed of the wheel increases from 0 to 9.8 rad/s. Determine the moment of inertia of the wheel.

*April 26, 2015 by Exes*

**Physics**

A wheel of arduous 30 cm is rotating at a rate of 2.0 revolutions every 0.080 s. Through what angle, in radians, does the wheel rotate in 1.0 s? What is the linear speed of a point on the wheel's rim? What is the wheel's frequency of rotation?

*October 9, 2012 by Anonymous*

**Physics**

The distance between the centers of the wheels of a motorcycle is 169 cm. The center of mass of the motorcycle, including the rider, is 77.0 cm above the ground and halfway between the wheels. Assume the mass of each wheel is small compared to the body of the motorcycle. The ...

*April 24, 2013 by Hubert*

**Physics**

A Ferris wheel, rotating initially at an angular speed of 0.500 rad/s, accelerates over a 7.00-s interval at a rate of 0.04 rad/s^2. What angular displacement does the Ferris wheel undergo in this 7-s interval?

*June 8, 2010 by Ashley*

**physcis**

During a ski race, Kate uniformly accelerated at 3.15m/s^2 for 100meters. She then maintained this velocity for another 100m. she then uniformly decelerated at 6m/s^2 for 2 seconds. she accelerates back to her maximum velocity over the next 200meters in 16 seconds. she then ...

*March 4, 2010 by jake*

**physics**

During a ski race, Kate uniformly accelerated at 3.15m/s^2 for 100meters. She then maintained this velocity for another 100m. she then uniformly decelerated at 6m/s^2 for 2 seconds. she accelerates back to her maximum velocity over the next 200meters in 16 seconds. she then ...

*March 4, 2010 by jake*

**math**

At the amusement park, you decide to ride the Ferris wheel, which has a maximum height of 50 meters and a diameter of 35 meters. It takes the wheel three minutes to make one revolution. If you start your ride at the midline and the ferris wheel rotates counter clockwise, how ...

*November 21, 2014 by jackie*

**Math**

In one revolution a wheel moves forward a distance equal to its circumference. This is because the wheel Always in contact with the floor. 1)A trundle wheel clicks everytime. What is the radius of the wheel I really don't get this question Please Help me Thank you :)

*October 5, 2013 by Linda*

**Science**

The rider to a Ferris wheel moves at a rate of 0.18m/s2. If the rider is 5.0m from the center of the Ferris wheel, what is his/her velocity?

*June 23, 2015 by Alfonz*

**Physics**

A 1.11 kg toy train rolls around a circular horizontal track. If the train has an angular acceleration of -2.2 rads/s2 and is released with an angular speed of 17.0 rpm, what time is required for the train to come to a complete stop?

*October 22, 2016 by Tom*

**Physics**

A 1.96 kg toy train rolls around a circular horizontal track. If the train has an angular acceleration of -1.95 rads/s2 and is released with an angular speed of 33.0 rpm, what time is required for the train to come to a complete stop?

*October 24, 2016 by Anonymous*

**Physics**

A turntable rotates counterclockwise at 63 rpm. A speck of dust on the turntable is at θ = 0.57 rad at t = 0 s. What is the angle of the speck at t = 9.5 s? Your answer should be between 0 and 2π rad.

*April 3, 2014 by Jack*

**physics**

An object accelerates uniformly from rest at a rate of 2 m/s2 for 3 s and then 5 m/s2 for 15 s. Find its final velocity?

*November 30, 2010 by Anonymous*

**physics**

A car accelerates uniformly from 10m/s to 24m/s.Ehat is its average speed?

*September 24, 2013 by cleverdoc2*

**physics**

A space vehicle accelerates uniformly from 80 m/s at t = 0 to 165 m/s at t = 10.0 s .How far did it move between t = 2.0 s and t = 6.0 s ?

*January 23, 2017 by Anonymous*

**physics**

A hollow steel shaft has an external diameter of 120 mm and is 10 mm thick. It is coupled to a solid shaft of the same material, 100 mm in diameter. If the length of the hollow shaft is 960 mm, find the length of the solid shaft, so that the total angle of twist is limited to ...

*May 18, 2013 by Anonymous*

**Math**

This question is really stressing me out. I don't even know where to start. The question is: The Northern Tier bicycle tour route from Anacortes, Washington, to Bar Harbor, Maine, is 4,264.5 miles long. How many more revolutions over the entire route will a 16 inch diameter ...

*August 29, 2015 by Jules*

**physics**

With a magnetic field perpendicular to a single 13.2 cm diameter circular loop of copper wire decreases uniformly from .670 T to zero. If the wire is 2.25 mm in diameter how much charge moves past a point in the coil during this operation?

*April 28, 2014 by jon*

**Trigonometry**

My answer: Y= -82.5 cos (4pi/3)x+91.5 (Period: 1.5=2pi/b --> b= 4pi/3 ) The diameter of the wheel is 165 feet, it rotates at 1.5 revolutions per minute, and the bottom of the wheel is 9 feet above the ground. Find an equation that gives a passenger's height above the ground...

*July 18, 2013 by Anonymous*

**arithmetic**

if the internal diameter of a cylindrical iron piep is 2.8 cm . If the pipe is melted uniformly by 1 mm then it formed a cylindrical rod ,find the diameter of the new rod?

*November 5, 2014 by Anonymous*

**Physics**

A 15 kg child stands on the edge of a small merry-go-round of radius 2.0 m. If the merry-go- round turns at a steady rate of 11 rpm, calculate the magnitude and direction of the net force on the child.

*March 25, 2012 by Kristina*

**Math**

A ferris wheel is 30 meters in diameter and boarded in the six o'clock position from a platform that is 10 meters above the ground. The wheel completes one full revolution every 10 minutes. At the initial time t=0 you are in the twelve o'clock position.Find a formula, using ...

*December 10, 2012 by Elizabeth*

**Physics**

A turntable rotating at 33 1/3 rpm is shut off. It brakes with constant angular deceleration and stops in 26 seconds. Find the average angular acceleration. I took 33 1/3 divided by 26 and then tried to convert to rad/s^2 but I keep getting the wrong answer. How should I ...

*February 13, 2017 by Zoey*

**physical science**

A car drivers at 5 km/hr, consumes one liter of petrol per 50km. The RPM is 50. How many mintues will the car drive on one litre of petrol. Kindly supply formula and answer.

*February 18, 2015 by eugene*

**geometry**

Name the diameter, radius, center, and the equation of the circle with a diameter that has endpoints at (-3, 4) and (5, -2).

*February 7, 2013 by Anonymous*

**Physics**

(b)A centrifuge has a maximum rotation rate of 10,000 rpm and can be stopped in 4 seconds. Assume the deceleration is uniform. The centrifuge radius is 8 cm. (i)What is the average angular acceleration of the centrifuge? (2%) (ii)What is the distance that a point ...

*August 12, 2010 by Oisin*

**Applied Mech.2**

Find the Inside diameter(d) and outside diameter(D) of a hollow shaft given: Power transmitted by shaft=1400kW Shaft speed=45 RPM Angle of twist on shaft=1 degree Shaft lenght(L)=25D Assume d=0.6D Modulus of Rigidity(G)=81.75GPa My answer: Shaft ang. vel.=45*2pi/60s A.V.=4....

*April 19, 2009 by Henri*

**Math**

You are in a car of a ferris wheel. The wheel has a radius of 8m and turns counterclockwise. Let the orgin be at the center of the wheel. Begin each sketch in parts a) and b) when the radius from the centre of the wheel to your car is along the positive x-axis. a) Sketch the ...

*March 6, 2013 by Kristien*

**math**

At the amusement park, you decide to ride the Ferris wheel, which has a maxmum height of 80 meters and a diameter of 40 meters. It takes the wheel seven minutes to make one revolution. If you start your ride at the midline and the ferris wheel rotates counter clockwise, how ...

*November 21, 2014 by jackie*

**phy**

A record player takes 4.5 sec to spin up to 45 RPM. What is the angular displacement and angular velocity when t=3 sec. I was only able to find angular acceleration from the information given. Which is 1.05 rad/sec^2

*May 4, 2016 by bonsnianbill*

**physics**

A space vehicle accelerates uniformly from 50m/s at t=0 to 182m/s at t=1 0.0s. How far did it move between t=2.0s and t=6.0s?

*July 10, 2011 by victor*

**physics**

a car starts from rest and accelerates uniformly at 2m/s for 10second. what is its velocity at the end of 10 second?

*June 20, 2012 by Anonymous*

**Physics**

how long does it take a car to change its velocity from 15m/s to 25m/s if it accelerates uniformly at 5m/s2.

*November 23, 2015 by Prince*

**NCC**

a sportscar starting from rest accelerates uniformly at 2m/s squared . What is the speed after 10S?

*August 11, 2016 by kim*

**Math (please help!)**

The largest Ferris Wheel in the world is the London Eye in England. The height (in metres) of a rider on the London Eye after t minutes can be described by the function h(t) = 67 sin[0.2094(t-30)] + 70 Using this equation i'm supposed to find the diameter, the maximum (top of ...

*January 23, 2011 by Haley*

**Physics**

This is a very confusing problem, I had never taken physics before and it is going to kill my GPA. can someone please help me solve this problem. I have a quiz coming up. Thanks for the help. The flywheel of an old steam engine is a solid homogeneous metal disk of mass M = 137...

*October 31, 2014 by Rhyan*

**trigonometry**

If a flywheel is 3 feet in diameter and if a belt over the wheel is traveling at the rate of 3000 feet per minute, find the number of revolutions of the wheel per minute.

*September 2, 2011 by Marie :)*

**Phar Science**

In a sedimentation experiment using a centrifuge rotating at 20,000 rpm at 25°C the position of the boundary between the settled phase and the supernatant for a protein was found to be at 6.153 cm at t = 300 s, 6.179 at 600 s, and 6.206 at 900 s. If D for the protein is 7.62...

*April 5, 2011 by Sha*

**Phar Science**

In a sedimentation experiment using a centrifuge rotating at 20,000 rpm at 25°C the position of the boundary between the settled phase and the supernatant for a protein was found to be at 6.153 cm at t = 300 s, 6.179 at 600 s, and 6.206 at 900 s. If D for the protein is 7.62...

*April 5, 2011 by Sha*

**Physics**

At a county fair, a boy and two friends bring their teddy bears on the giant Ferris wheel. The wheel has a diameter of 14.0 m, the bottom of the wheel is 1.9 m above the ground and its rim is moving at a speed of 1.0 m/s. The boys are seated in positions 45° from each other. ...

*October 14, 2010 by Gina*